I talked to Shawn in the pro-shop face to face, and in an email with Katie Mitchell, both assured me the lead core with BiMJ was fine. I've had two weeks in a row where all of the RO's have seen what I have been shooting and haven't said a word. The one even wanted to keep the casings because they were old looking.

I was told by Shawn that they sell the surplus stuff there because simply stated, it's cheaper. If they sell it, you can shoot it. He even described it coming in a funny looking case, which I'm assuming is a spam can or one of the cases the Russian 40's stuff comes in.